JPH08321227A - Switch - Google Patents

Abstract

PURPOSE: To construct a switch small and enhance its producibility by furnishing a changeover plate which is arranged turnably, has a leaf spring in the central part, and whose one end is engaged with a driving piece while other end is in contact with a stationary terminal. CONSTITUTION: A driving piece 14 has an substantially inverted U-shape. and V-grooves 14a are formed at the foremost parts. A curved leaf spring 15b in cantilever form is installed in the central part of a changeover plate 15, and the foremost part 15c of this leaf spring 15b is rotatably detained with one side of the groove 14a. The other side groove 14a in the driving piece 14 is turnably detained with a locking part 15d of changeover plate 15 at the end opposite the contact 15a. When a slide 17 is pressed, the contact 15a installed at the foremost of the plate 15 moves in reversal to come in contact with a contact 12a furnished on a stationary terminal 12, and the switch is turned on. This lessens the number of component parts in use, facilitates assembly along with simplified structure, decreases the height of the switch because of lateral arrangement of the plate 15, and permits constructing small as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used in various electronic devices.

[0002]

2. Description of the Related Art A conventional switch will be described with reference to FIG. In the figure, 1 is an insulating case in which a fixed terminal 2 and a common terminal 3 each having contacts 10a and 10b are implanted, 3a is an upper fulcrum portion provided in a notch of the common terminal 3, and 3b is It is a lower fulcrum part provided in the notch,
The reference numeral 6 designates the contact point 10 whose upper end portion 6a is locked in the concave portion of the sliding member 7 and which abuts on the lower end portion side of the contact fixing portion 3c of the common terminal 3.
It is a movable switching plate having b.

Reference numeral 5 is a substantially inverted V-shaped leaf spring, the upper end of which is locked to the movable switching plate 6 (locking point B) and the lower end of which is locked to the lower fulcrum portion 3b of the common terminal 3. . Reference numeral 4 denotes a substantially V-shaped switching piece, the upper end of which is locked to the upper fulcrum portion 3a of the common terminal 3 (locking point C) and the lower end of which is locked to the movable switching plate 6 (locking point A). There is.

Reference numeral 9 is a coil spring which constantly urges the sliding body 7 outward, and reference numeral 8 is a metal cover which covers the opening of the insulating case 1.

Next, the operation of the above-mentioned conventional switch will be described with reference to the schematic diagrams of the operation of the movable portion such as the movable switching plate 6 shown in FIGS.

The sliding body 7 is moved in the direction of the arrow in FIG.
When pressed as shown in (b), the locking point C moves to the opposite side from the line connecting the locking points A and B, and the locking point C crosses this connecting line, as shown in FIG. ), The contact 10b provided at the lower end of the movable switching plate 6 reversely moves and comes into contact with the contact 10a provided at the fixed terminal 2, and the switch is turned on.

[0007]

However, in the above-mentioned conventional switch, since the movable switching plate 6 is arranged in the vertical direction, the height of the switch becomes large, and the number of parts is large.
Moreover, there was a problem that it was difficult to incorporate.

The present invention solves such conventional problems,
It is intended to provide a small-sized switch with high productivity.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises a drive piece rotatably pressed against a protrusion provided on an upper portion of a common terminal, and a leaf spring bent at one end of the drive piece. The switching plate has a switching plate which is held in the center, rotatably engages the tip end of the leaf spring, and is rotatably engaged with one of the driving pieces inside the other end.

[0010]

With the above structure, the height of the switch can be reduced, the number of parts can be reduced, and the assembling can be facilitated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 and FIG. 2 are exploded perspective views showing the structure of the switch according to this embodiment in a partially cutaway section. In FIG. 1, 11 is a fixed terminal 12 provided with a contact 12a and a common terminal 13 is implanted. It is an installed insulating case. 14 is almost inverted U
A switching plate having a V-shaped groove 14a formed at both ends and having a cantilevered curved leaf spring 15b in the center of one of the V-shaped grooves 14a. The distal end portion 15c of the leaf spring 15b of 15 is rotatably engaged, and the switching plate 1 is provided with a V-shaped groove 14a on the opposite side of the driving piece 14.
The contact point 15a of No. 5 is rotatably locked by a locking portion 15d at one end on the opposite side. Further, the inverted U-shaped driving piece 14
An upper side surface 13a of the common terminal 13 is rotatably sandwiched by a convex rib 14b on the inner side of. Reference numeral 17 is a sliding body that supports and drives the upper portion of the driving piece 14. 1
Reference numeral 8 denotes a frame which is connected to the insulating case 11 and slidably accommodates the sliding body 17, and 19 denotes a coil spring for constantly urging the sliding body 17 in one direction.

Next, the operation of the above switch will be described with reference to FIG. The sliding body 17 is moved in the direction of the arrow as shown in FIGS.
, The line connecting the locking point A and the leaf spring movable center C is moved to the opposite side of the locking point B, and the connecting line is connected to the locking point B.
3C, the contact 15a provided at the tip of the switching plate 15 reversely moves and comes into contact with the contact 12a provided on the fixed terminal 12 to turn on the switch.

As described above, the switch according to the present invention has a small number of parts, has a simple structure and is easy to assemble, and further, since the switching plate can be arranged in the lateral direction, the switch height is small and the overall size is reduced. can do.
In addition, as shown in FIG. 4, the driving piece 14 and the switching plate 15 are combined in advance, the common terminal 13 and the fixed terminal 12 are further implanted in the insulating case 11, and then the driving piece 14 is inserted into the common terminal 13. It is extremely easy to assemble.

Further, when the switch is ON, the leaf spring 15b of the switching plate 15 has an effect that it can be compressed to increase the contact pressure, which is shown in FIGS.
This will be described in (c).

As shown in the figure, since the driving piece 14 swings with the common terminal 13 being sandwiched by the inverted U-shaped driving piece 14, the driving piece 14 is expanded or returned by the common terminal 13. To do. Therefore, the driving piece 14 is pushed wider in the state of FIG. 5 (a) (OFF) and in the state of FIG. 5 (c) (ON) than in the state of FIG. 5 (b), and S ₂ <S ₁ , S ₂ <S ₃ Becomes

[0017] Accordingly, since the bending state of the spring 15b is pushed open as S ₃ in the ON state, H3 of spring portion is contracted press, can strong spring force is exerted in the ON state for this presses the contact 12a The power also increases.
In addition, even in the OFF state, the force for pushing up the contact 15a becomes large and the force for separating the contact increases, so that when a large current is applied, there is a great effect on burning or welding of the contact. Further, when the contact pressure is constant, a thinner leaf spring can be used, and reliability such as repeated life can be improved.

FIG. 6 shows another embodiment of the present invention. In FIG. 6, 16 is a leaf spring, and one end 16a
After being rotatably locked to the cutout portion 15e of the switching plate 15, the configuration is similar to that of the above-described embodiment.

With such a structure, the leaf spring 16 can be freely selected and the performance in repeated life can be improved.

FIG. 7 also shows another embodiment of the present invention, in which a recess 13a is formed on the upper side surface of the common terminal 13,
The inner protrusion 14b of the drive piece 14 is rotatably engaged with the drive piece 14, and the slide piece 17 causes the drive piece 14 to rotate about the inner protrusion 14b. The end on the opposite side of the contact is pivotally moved up and down about the contact 15a.
When a and the contact 12a are welded, a large welding detachment force can be obtained.

FIG. 8 also shows another embodiment of the present invention, in which a projection 11a extending from the bottom surface of the insulating case 11 is provided near the outside of the end of the switching plate 15 opposite to the contact 15a. FIG. 9 also shows another embodiment of the present invention, in which a protrusion 13b extending from the common terminal 13 is formed near the outside of the end of the switching plate 15 on the opposite side of the contact 15a.
With the configuration as shown in FIGS. 8 and 9, even if a strong impact is applied to the switch, the switching plate 15 comes into contact with the protrusions 11a and 13b,
This has the effect of preventing the switching plate 15 from coming off and from being deformed due to buckling of the spring portion.

FIGS. 10, 11 (a) and 11 (b) also show another embodiment of the present invention. FIG.
In this configuration, the driving piece 14 is further expanded, the spring pressure of the switching plate 15 is increased, and the moving stroke of the sliding body 17 is further increased. Since a large amount of movement at points A and B shown in FIG. 3 can be secured, the movement stroke of the sliding body 17 can be reduced.

11A and 11B show the shape of the common terminal 13.

[0024]

As described above, in the switch according to the present invention, since the switching plate can be arranged in the lateral direction, not only can the height direction be made thin and the size can be reduced, but also the simple construction can reduce the number of parts and facilitate the operation. Since it can be assembled, it can be provided at low cost.

Further, the force for pressing the contact of the fixed terminal can be increased as compared with the conventional one, and the force for pushing back the contact at the time of disconnecting the connection can also be increased, so that a highly reliable switch can be realized. can do.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a partially broken surface of a switch according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a partially broken surface of a switch according to another embodiment.

FIG. 3A is a side sectional view of an essential part in a switch OFF state for explaining the operation of the switch according to the embodiment. FIG. 3B is a side view of an essential part in a state immediately before the switch is turned ON. Side view of the main part of the state

FIG. 4 is a partial cross-sectional side view showing an assembled state of the parts of the embodiment.

FIG. 5A is a side sectional view of an essential part in a switch OFF state for explaining the contact pressure increase when the switch is ON according to the embodiment. FIG. 5B is a side sectional view of an essential part immediately before the switch is turned ON. ) Side sectional view of the main part after the switch is turned on

FIG. 6 is an exploded perspective view of a main part of a switch according to another embodiment.

FIG. 7 is a side sectional view of a main part of a switch according to another embodiment.

FIG. 8 is a side sectional view of a main part of a switch according to another embodiment.

FIG. 9 is a side sectional view of a main part of a switch according to another embodiment.

FIG. 10 is a side sectional view of a main part of a switch according to another embodiment.

11 is a perspective view of a common terminal used in the switch of FIG.

FIG. 12 is a side sectional view of a conventional switch.

FIG. 13 is a schematic diagram for explaining the operation of the movable part.

[Explanation of symbols]

 11 Insulation Case 12 Fixed Terminal 12a Fixed Terminal Contact 13 Common Terminal 13a Common Terminal Upper Side 14 Drive Piece 14a V-Shaped Groove 14b Inner Convex 14c Drive Piece Upper 15 Switching Plate 15a Contact 15b Leaf Spring 15c Leaf Spring Tip part 17 Sliding body 18 Frame 19 Coil spring

Claims (5)

[Claims] 1. An insulating case in which a fixed terminal and a common terminal are planted, a drive piece rotatably arranged in a pressure contact state above the common terminal, and a cantilevered curved plate provided in a central portion. A switching plate rotatably arranged so that the tip of the spring is engaged with one side surface of the drive piece, one end is engaged with the other side surface of the drive piece, and the other end is in contact with the fixed terminal. And a slide member which is engaged with the upper end portion of the drive piece and is slidably incorporated in the insulating case. 2. The switch according to claim 1, wherein both ends of the upper end of the common terminal are rotatably sandwiched by the tip of the driving piece formed in a substantially inverted U shape. 3. The switch according to claim 2, wherein a recess is provided on one side surface of an upper end of the common terminal, and one end of a substantially U-shaped drive piece is rotatably locked in the recess. 4. The switch according to claim 1, wherein a protrusion is provided from the bottom surface of the insulating case near the tip of the switching plate on the side engaged with the driving piece. 5. The switch according to claim 1, wherein a projection is provided from the common terminal in the vicinity of the tip of the switching plate on the side engaged with the driving piece.